Utz was originally just the name of the owner, William Utz, on the logo. The first name was "Hanover Home Brand".
Utz became an incorporated company, and changed the base name to just "Utz's".
Utz minorly shortened their name to just "Utz". The 'Little Utz Girl' is changed to appear to be more animated than the former logo. The chip bag part of the logo was widened also appear to be more animated. The chip bag was also cut in half. The girl also only has one arm in the logo. The word Utz was changed in font and changed to lowercase letters.